http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Xuan Do, Truong,Prajitno, Hermawan,Lim, Young-Il,Kim, Jaehoon Elsevier 2019 The Journal of supercritical fluids Vol.150 No.-
<P><B>Abstract</B></P> <P>The solvothermal liquefaction of sewage sludge (SS) has received much attention as an ecofriendly method of liquid fuel production. In this study, we evaluated the economic feasibility of bio-heavy-oil (BHO) production from 100 t/d SS using supercritical ethanol (scEtOH) and methanol (scMeOH). The process included a dryer, supercritical reactor, BHO separator, steam boiler, wastewater treatment unit and storages. Two cases for the techno-economic analysis (TEA) were considered: BHO production with scEtOH (Case 1) and with scMeOH (Case 2). The four-level economic potential approach (4-level EP) was used for the TEA. The total capital investments of Cases 1 and 2 were 19.6 and 19.5 million dollars, respectively. Case 2 showed higher economic potential than Case 1 because of the low price of methanol. The BHO plant using scMeOH was economically feasible with a return on investment of 21%/a.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Bio-heavy-oil (BHO) was produced by supercritical (SC) reaction of sewage sludge (SS). </LI> <LI> Process flow diagram for 100 t/d SS plants is proposed using SC ethanol and methanol. </LI> <LI> The BHO plant with SC methanol was more profitable than that with SC ethanol. </LI> <LI> The full-scale BHO plant with scMeOH showed economic feasibility with a 21% ROI. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Process modeling and energy consumption of fry-drying and torrefaction of organic solid waste
Do, Truong Xuan,Lim, Young-il,Cho, Hyodeuk,Shim, Jaehui,Yoo, Jeongkeun,Rho, Kyutai,Choi, Seong-Geun,Park, Byung-Yoon M. Dekker 2017 Drying technology Vol.35 No.6
<P>A commercial fry-drying and torrefaction (FDT) plant for producing bio-solid fuel from 45 ton/d organic sludge with 80% water was proposed. The FDT plant was modeled by a process simulator with the aid of plant data. Two double-effect evaporators were used in series to vaporize water, using heat-carrying oil. Torrefied and pelletized bio-solid was produced at 413 kg/h, comprising 4.4 and 4.8% of water and oil, respectively, and 67% of its mass was used as heat source. The total energy consumption was 1,369 kW, including 93 kW electrical and 1,276 kW thermal energies. The total heat duty was 788 kcal/kg-water.</P>
Techno-economic analysis of fry-drying and torrefaction plant for bio-solid fuel production
Do, Truong Xuan,Lim, Young-il,Cho, Hyodeuk,Shim, Jaehui,Yoo, Jeongkeun,Rho, Kyutai,Choi, Seong-Geun,Park, Chanwoo,Park, Byeong-Yun Elsevier 2018 Renewable energy Vol.119 No.-
<P><B>Abstract</B></P> <P>A total of 10 t/d of bio-solid (BS) fuel was produced from 45 t/d of organic solid waste (OSW) containing 80 wt% water using a fry-drying and torrefaction (FDT) plant. This study aimed at evaluating economic feasibility of the FDT plant in terms of the total capital investment (TCI), total production cost (TPC), return on investment (ROI) and payback period (PBP). Two different heating sources for steam generation were used: Case 1 using BS produced in this plant, and Case 2 using LNG provided externally. A four-level economic potential approach was applied to evaluate economic feasibility. A sensitivity analysis was conducted to determine the major factors influencing ROI. Case 1 using BS showed a higher ROI than Case 2 using LNG because the LNG cost overwhelmed the TCI increment of Case 1. For Case 1 with 45 t/d of OSW, the TCI, TPC, ROI and PBP were $3.6 million, $1.3 million/yr, 6.0%/yr and 9.8 yr, respectively. To achieve a desired ROI of 10%/yr, the plant sizes of Cases 1 and 2 were 60 and 90 t/d, respectively. When the OSW treatment credit increased from 100 $/t to 120 $/t, ROI exceeded 10% in Case 1 with 45 t/d.</P> <P><B>Highlights</B></P> <P> <UL> <LI> 10 t/d bio-solid (BS) was produced from 45 t/d of organic sludge by fry-drying plant. </LI> <LI> Economic feasibility was evaluated based on a four-level economic potential approach. </LI> <LI> Fry-drying plant using BS as a heating source was more efficient than that using LNG. </LI> <LI> The minimum plant size required to achieve a return on investment of 10% was 60 t/d. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Optimal Provider Mobility in Large-Scale Named- Data Networking
( Truong-xuan Do ),( Younghan Kim ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.10
Named-Data Networking (NDN) is one of the promising approaches for the Future Internet to cope with the explosion and current usage pattern of Internet traffic. Content provider mobility in the NDN allows users to receive real-time traffic when the content providers are on the move. However, the current solutions for managing these mobile content providers suffer several issues such as long handover latency, high cost, and non-optimal routing path. In this paper, we survey main approaches for provider mobility in NDN and propose an optimal scheme to support the mobile content providers in the large-scale NDN domain. Our scheme predicts the movement of the provider and uses state information in the NDN forwarding plane to set up an optimal new routing path for mobile providers. By numerical analysis, our approach provides NDN users with better service access delay and lower total handover cost compared with the current solutions.
Truong-Xuan Do,김영한 한국통신학회 2017 ICT Express Vol.3 No.2
Distributed mobility management (DMM) is currently being researched and standardized in academia and standardization development organizations for the purpose of overcoming the major issues of existing centralized mobility management. The most recent DMM protocols are being redesigned with regard to the control and data plane separation concept. However, at present, there is no solution for supporting IP multicast listeners in such new DMM environments. In this paper, we review ongoing academic research works, standardization activities and propose an IP multicast mobility design for the DMM environment using the control and data plane concept.